S
M
T
W
T
F
S
26
67°
34°
27
61°
37°
28
63°
42°
29
66°
33°
30
75°
37°
1
71°
48°
2
67°
47°
3
83°
44°
4
67°
53°
5
67°
50°
6
71°
48°
7
71°
49°
8
69°
45°
9
78°
49°
10
72°
47°
11
77°
52°
12
78°
51°
13
70°
48°
14
67°
45°
15
66°
42°
16
68°
41°
17
72°
44°
18
71°
45°
19
71°
45°
20
70°
44°
21
74°
44°
22
69°
45°
23
67°
41°
24
64°
44°
25
63°
42°
26
62°
42°
27
63°
43°
28
64°
41°
29
66°
46°
30
65°
45°
31
64°
42°
1
65°
44°
2
68°
45°
3
67°
45°
4
68°
42°
5
70°
48°
6
73°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Cottage Grove
Cottage Grove's May 2026 forecast shows daily high temperatures ranging from 62° to 78°, with overnight lows between 41° and 52°. The average high for May is 69° with an average low of 45°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Cottage Grove. See also: June | July | August.
